Lights under surfboards could deter shark attacks - study

A recent study conducted by Australian scientists has revealed an innovative approach to reducing the risk of shark attacks on surfers. The research, which took place in Mossel Bay, South Africa, focused on the effectiveness of LED lights attached to the bottom of surfboards. The scientists aimed to determine whether these lights could deter great white sharks, a species known for its involvement in most shark-related fatalities. nThe team from Macquarie University in New South Wales towed seal-shaped boards equipped with various configurations of lights behind a boat. They observed how the different light setups affected the sharks' behavior. The researchers discovered that the lights altered the appearance of the boards from above, making it more difficult for the sharks to see them against the bright sunlight. This finding suggests that using lights could be a non-invasive method to keep sharks at bay, unlike traditional methods such as nets or drones. nThe study found that when the brightest LED light strips were used and positioned horizontally, the boards were less likely to be targeted by the sharks. Lead researcher Laura Ryan explained that great white sharks often attack from below and may mistake a surfer's silhouette for that of a seal. The researchers also emphasized the need to investigate whether the LED lights would be effective against other shark species known to pose a threat to humans, such as bull sharks and tiger sharks. Most shark attacks occur during activities like surfing and other board sports. In 2023, there were 69 unprovoked shark bites reported, primarily in the United States, Australia, and South Africa, with 10 of those resulting in fatalities. nThe Australian study tested three different intensities of LED lights. Ms. Ryan noted that the brightest lights aligned horizontally were the least likely to attract the sharks. The researchers stated, 'Our results highlight the significance of a dark silhouette against a lighter background in the predatory behavior of great white sharks. Altering the silhouette may lead to the development of new non-invasive shark deterrent technologies to safeguard human life. ' Interestingly, the researchers found that great white sharks were less drawn to the most conspicuous lights, even though other studies have indicated that some shark species are attracted to bright, reflective objects. nCurrently, the researchers are in the process of creating prototype lighting strips to test on surfboards and kayaks. This innovative approach could potentially revolutionize how surfers protect themselves from shark encounters while enjoying their time in the water.